I loved her NF (on Orwell and Burma) and loved this new novel too.
The books opens with the state opening an empty shopping container, and denying any bodies have been found. This is a narrative with multiple viewpoints, from across Bangkok society including an expat bored housewife, a slum landlord and a foodstall-owning senior. The subsequent discovery of a mass grave in a patch of "jungle" in urban Bangkok has everyone on the move.